It is time for you to do your Self-Work. Discover who you are, what you like and do not like, and create some boundaries.Start with reprogramming your self talk.
Set business hours for your loved ones to discipline yourself as to when you can do favors for others.
Discern what is a true favor versus something you should either be paid for or receive something of equal value in exchange for your help.
Do not do this half-assed. Take time to SEE OR SEEK the value of who you are inside you.